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  <title>Program execution 函数</title>

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  <h1 class="title">Program execution 函数</h1>

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   <div class="section" id="exec.notes">
    <h2 class="title">注释</h2>
    <div class="warning"><strong class="warning">Warning</strong>
     <p class="para">
      Open files with lock (especially open sessions) should be closed before
      executing a program in the background.
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   <div class="section" id="exec.seealso">
   <h2 class="title">参见</h2>
    <p class="para">
     These functions are also closely related to the 
     <a href="language.operators.execution.html" class="link">backtick operator</a>.
     Also, while in <a href="ini.sect.safe-mode.html#ini.safe-mode" class="link">安全模式</a> you
     must consider the <a href="ini.sect.safe-mode.html#ini.safe-mode-exec-dir" class="link">
     safe_mode_exec_dir</a> directive.
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 <h2>Table of Contents</h2><ul class="chunklist chunklist_reference"><li><a href="function.escapeshellarg.html">escapeshellarg</a> — Escape a string to be used as a shell argument</li><li><a href="function.escapeshellcmd.html">escapeshellcmd</a> — Escape shell metacharacters</li><li><a href="function.exec.html">exec</a> — Execute an external program</li><li><a href="function.passthru.html">passthru</a> — Execute an external program and display raw output</li><li><a href="function.proc-close.html">proc_close</a> — Close a process opened by proc_open and return the exit code of that process</li><li><a href="function.proc-get-status.html">proc_get_status</a> — Get information about a process opened by proc_open</li><li><a href="function.proc-nice.html">proc_nice</a> — Change the priority of the current process</li><li><a href="function.proc-open.html">proc_open</a> — Execute a command and open file pointers for input/output</li><li><a href="function.proc-terminate.html">proc_terminate</a> — Kills a process opened by proc_open</li><li><a href="function.shell-exec.html">shell_exec</a> — Execute command via shell and return the complete output as a string</li><li><a href="function.system.html">system</a> — Execute an external program and display the output</li></ul>
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